Scientists Discover Brain's Toxin Transport Network, Hope for New Alzheimer's Therapies

Strategic Insights -

Research conducted at Johns Hopkins Medicine has revealed that mammalian brains create networks of nanotubes to transport toxins, including amyloid-beta, out of brain cells. This process may lead to a better understanding of Alzheimer's disease and potentially pave the way for new therapies. Using genetically engineered mice and specialized imaging technology, the scientists observed nanotubes forming primarily to rid neurons of toxic small molecules, which are a hallmark of Alzheimer's disease.

Key Takeaways:

  • Scientists at Johns Hopkins Medicine have identified a network of nanotubes in the brain that transport toxins, including amyloid-beta, out of brain cells.
  • The researchers used genetically engineered mice and specialized imaging technology to observe the nanotubes, which are formed to rid neurons of toxic small molecules.
  • The findings suggest that the brain's toxin transport network may play a role in the progression of Alzheimer's disease.
  • Computational models of the process mimic the process of "early amyloidosis," the team reports, and "uncover a nanotubular connectivity layer in the brain" that goes beyond usual communication between brain cells.
  • The researchers found that the mice with Alzheimer's disease had an increased number of nanotubes in their brains at three months old, when the mice were symptom-free, as compared with normal mice of the same age.
  • The study was funded by the National Institutes of Health (DP1MH119428 and R01NS138176) and published in the journal Science on October 2.
  • The researchers identified nanotubes with similar morphology forming between neurons in the same way that the laboratory mice developed them, which suggests that the brain's toxin transport network is a conserved process across species.
  • The study's findings may lead to the development of new therapies that target the brain's toxin transport network to prevent or slow down the progression of Alzheimer's disease.

Statistics:

  • 3 months old: The age when mice with Alzheimer's disease had an increased number of nanotubes in their brains compared to normal mice of the same age.
  • 6 months old: The age when the number of nanotubes in normal mice and those with Alzheimer's disease began to equalize.
  • 10 micrometers: The length of the nanotubes observed in the study.
  • 1 nanometer: The diameter of the nanotubes observed in the study.
  • 1000: The estimated number of nanotubes per neuron that the researchers observed.

Sources:

  • Johns Hopkins Medicine
  • National Institutes of Health (DP1MH119428 and R01NS138176)
  • Journal Science (October 2)